Guajillo is a traditional chili pepper variety, and one of the main producers of this variety is the state of Zacatecas. The guajillo is the dried form of mirasol chili pepper and its Scoville Heat Unit (SHU) ranges from 2,500 to 5,000. The skin is leathery and reddish brown, and the flavors are fruity and mild to moderately hot, with hints of green tea and berries.